/*
 * Copyright (C) 2008 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.simon.gpsinfo;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

/**
 * Class define access to data base.
 * 
 */
public class GPSDbAdapter {

	public static final String KEY_ROWID = "_id";
	public static final String KEY_TIME = "time";
	public static final String KEY_SPEED = "speed";
	public static final String KEY_ACCURACY = "accuracy";
	public static final String KEY_ALTITUDE = "altitude";
	public static final String KEY_BEARING = "bearing";
	public static final String KEY_LATITUDE = "latitude";
	public static final String KEY_LONGITUDE = "longitude";
	public static final String KEY_PROVIDER = "provider";

	private static final String TAG = "GPSDbAdapter";
	private DatabaseHelper mDbHelper;
	private SQLiteDatabase mDb;

	/**
	 * Database creation sql statement
	 */
	private static final String DATABASE_CREATE = "create table gpsinfo (_id integer primary key autoincrement, "
			+ "time real, speed real, accuracy real, altitude real, bearing real, latitude  real, longitude real, provider text);";

	private static final String DATABASE_NAME = "gpsdata";
	private static final String DATABASE_TABLE = "gpsinfo";
	private static final int DATABASE_VERSION = 2;

	private final Context mCtx;

	private static class DatabaseHelper extends SQLiteOpenHelper {

		DatabaseHelper(Context context) {
			super(context, DATABASE_NAME, null, DATABASE_VERSION);
		}

		@Override
		public void onCreate(SQLiteDatabase db) {

			db.execSQL(DATABASE_CREATE);
		}

		@Override
		public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
			Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
					+ newVersion + ", which will destroy all old data");
			db.execSQL("DROP TABLE IF EXISTS notes");
			onCreate(db);
		}
	}

	/**
	 * Constructor - takes the context to allow the database to be
	 * opened/created
	 * 
	 * @param ctx
	 *            the Context within which to work
	 */
	public GPSDbAdapter(Context ctx) {
		this.mCtx = ctx;
	}

	/**
	 * Open the notes database. If it cannot be opened, try to create a new
	 * instance of the database. If it cannot be created, throw an exception to
	 * signal the failure
	 * 
	 * @return this (self reference, allowing this to be chained in an
	 *         initialization call)
	 * @throws SQLException
	 *             if the database could be neither opened or created
	 */
	public GPSDbAdapter open() throws SQLException {
		mDbHelper = new DatabaseHelper(mCtx);
		mDb = mDbHelper.getWritableDatabase();
		return this;
	}

	public void close() {
		mDbHelper.close();
	}

	/**
	 * Create a new gps data. If the gps data is successfully created return the
	 * new rowId for that note, otherwise return a -1 to indicate failure.
	 * 
	 * @param title
	 *            the title of the note
	 * @param body
	 *            the body of the note
	 * @return rowId or -1 if failed
	 */
	public long create(Long time, Float speed, Float accuracy, Double altitude,
			Float bearing, Double latitude, Double longitude, String provider) {

		ContentValues initialValues = new ContentValues();
		initialValues.put(KEY_TIME, GpsDate.getDate());
		initialValues.put(KEY_SPEED, speed);
		initialValues.put(KEY_ACCURACY, accuracy);
		initialValues.put(KEY_ALTITUDE, altitude);
		initialValues.put(KEY_BEARING, bearing);
		initialValues.put(KEY_LATITUDE, latitude);
		initialValues.put(KEY_LONGITUDE, longitude);
		initialValues.put(KEY_PROVIDER, provider);

		Log.w(TAG, "Data = " + GpsDate.getDate());

		return mDb.insert(DATABASE_TABLE, null, initialValues);
	}

	/**
	 * Delete the note with the given rowId
	 * 
	 * @param rowId
	 *            id of note to delete
	 * @return true if deleted, false otherwise
	 */
	public boolean deleteNote(long rowId) {

		return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
	}

	/**
	 * Return a Cursor over the list of all notes in the database
	 * 
	 * @return Cursor over all notes
	 */
	public Cursor fetchAllGpsInfos() {
		return mDb.query(DATABASE_TABLE, new String[] { KEY_ROWID, KEY_TIME,
				KEY_SPEED, KEY_ACCURACY, KEY_ALTITUDE, KEY_BEARING,
				KEY_LATITUDE, KEY_LONGITUDE, KEY_PROVIDER }, null, null, null,
				null, null);
	}

	/**
	 * Return a Cursor positioned at the note that matches the given rowId
	 * 
	 * @param rowId
	 *            id of note to retrieve
	 * @return Cursor positioned to matching note, if found
	 * @throws SQLException
	 *             if note could not be found/retrieved
	 */
	public Cursor fetchGpsInfo(long rowId) throws SQLException {

		Cursor mCursor =

		mDb.query(true, DATABASE_TABLE, new String[] { KEY_ROWID, KEY_TIME,
				KEY_SPEED, KEY_ACCURACY, KEY_ALTITUDE, KEY_BEARING,
				KEY_LATITUDE, KEY_LONGITUDE, KEY_PROVIDER }, KEY_ROWID + "="
				+ rowId, null, null, null, null, null);
		if (mCursor != null) {
			mCursor.moveToFirst();
		}
		return mCursor;

	}

	/**
	 * Update the note using the details provided. The note to be updated is
	 * specified using the rowId, and it is altered to use the title and body
	 * values passed in
	 * 
	 * @param rowId
	 *            id of note to update
	 * @param title
	 *            value to set note title to
	 * @param body
	 *            value to set note body to
	 * @return true if the note was successfully updated, false otherwise
	 */
	/*
	 * public boolean updateNote(long rowId, String title, String body) {
	 * ContentValues args = new ContentValues(); args.put(KEY_TITLE, title);
	 * args.put(KEY_BODY, body);
	 * 
	 * return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) >
	 * 0; }
	 */
}
